全球渔业资源中,有多少是受到严重破坏()。
A.1/4
B.1/3
C.1/2
D.2/3
参考答案:D
I’m not sure about the meaning of the word. You’d better look it up in a ____ .
A.letter
B.dictionary
C.postcard
D.notice
简述共青团委员会的产生?